Devonian period


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Devonian period

a geological period lasting from about 415 to 370 million years ago. Many freshwater fish existed during this period and plants became established on land. True seed plants evolved and lycopods reached the size of trees. Amphibians evolved, the first known insects, spiders and mites occurred and most graptolites became extinct. Britain still lay south of the equator with the Thames at 10 °S. See GEOLOGICAL TIME.
References in periodicals archive ?
Washington, June 4 ( ANI ): Researchers from the University of Valencia and the Natural History Museum of Berlin have studied the fossilised remains of scales and bones found in Teruel and the south of Zaragoza, concluding that they belong to a new fish species called Machaeracanthus goujeti that lived in that area of the peninsula during the Devonian period.
Inland, the Windjana and Geikie gorges cut through a fossil reef system that is one of only four places on Earth that contains evidence of coral reefs from the Devonian period.
The warm climate and floods of the Devonian period produced fishes, ammonoids, and reefs but it also accommodated two of the biggest mass extinction events ever.
When Sugimoto began photographing undersea dioramas of the Devonian period (350 million years ago), it occurred to him that the trilobites, squids, and sea lilies had all been re-imagined from their fossils.
The ancient trees, which date from the Devonian period of the Paleozoic era, dwarf the longevity of Wales' oldest living tree - a yew tree in a Conwy churchyard.
The extinction during the Late Devonian period is widely considered one of the five massive extinctions in Earth's prehistory.
When our vertebrate ancestors first moved to land in the late Devonian period over 400 million years ago, they may have been carrying an unwanted guest in their cells.
Washington, Sept 13 (ANI): A new species of large predatory fish that prowled ancient North American waterways during the Devonian Period, before backboned animals existed on land has been discovered.
The fossils date from the earliest part of the Devonian period, around 400 million years ago,' said Dr Marriott, an expert in flood plains.
He also notes that in the Late Devonian period, before tectonic motions carried this region north, the area was located in the tropics.